JPH04252597A - Infrared ray remote controller - Google Patents

Abstract

PURPOSE:To offer the infrared ray remote controller able to send a control signal to a desired device to be controlled whose controlled range is set variably as desired. CONSTITUTION:The infrared ray remote controller switches an arrival range of a control signal being illuminant infrared ray from an LED 11 being a luminant means to either a comparatively wide control range 201 or a comparatively narrow control range 202 in response to a switching signal CHa outputted from a changeover switch section 120 with external operation.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared remote control device, and more particularly to an infrared remote control device whose controlled range can be variably set.

0002

2. Description of the Related Art An infrared remote control device, also called an infrared remote controller (abbreviation for remote controller), is a remote controller that transmits operating functions using an infrared modulation method.

Due to recent advances in semiconductor device manufacturing technology,
High-power infrared LED (Light Emittin)
g Diode) can now be obtained. Furthermore, a light receiver that efficiently receives infrared rays was obtained.

FIG. 7 is a diagram schematically showing a control signal reach range of a conventional infrared remote control device.

An infrared remote control device (hereinafter referred to as a remote control) 30 shown in FIG. 7 has an LED (not shown) inside thereof, and a control signal outputted by controlling the light emission of this LED is , a certain controlled range 40 is reached. Therefore, the controlled devices a1 to a3 installed within the controlled range 40 receive the control signal and operate accordingly, but the controlled devices b1 installed outside the controlled range 40 operate in response to the control signal. The control signal does not reach b2, and the controlled devices b1 and b2 do not operate.

As described above, the remote control 30 is normally used to transmit an infrared control signal to a controlled device that is desired to be controlled. At this time, the remote control 30 has a controlled range having a predetermined width so that the desired control device can be controlled even if the transmission direction is not definitely directed toward the desired controlled device. It is configured to increase the intensity of infrared rays so that the control signal can be transmitted.

[0007]

[Problems to be Solved by the Invention] The control signal outputted by the conventional infrared remote control device as described above is transmitted to a controlled object installed within a certain controlled range 40 as shown in FIG. 7, for example. Since the signal is transmitted to all of the devices a1, a2, and a3, the controlled devices a1 to a3 start operating all at once in response to the transmission control signal. Therefore, if the user controls the controlled device a shown in FIG.
Even when the remote controller 30 is operated with the desire to operate only the control device 3, all of the controlled devices installed within the controlled range 40 start operating, resulting in a problem of poor usability. In other words, since the reachable range of infrared control signals of conventional infrared remote control devices is always fixed, there is a problem that even undesired controlled devices are controlled, which makes them less practical.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an infrared remote control device that can variably set its controlled range as desired and transmit control signals to desired controlled devices.

[0009]

[Means for Solving the Problems] An infrared remote control device according to the present invention is a device that remotely controls a controlled object by modulating and transmitting infrared light, and includes a light emitting means for emitting the infrared light, and an external and a control means for variably controlling the reach range of the infrared rays emitted by the light emitting means according to the controlled range of the controlled object that is operated and remotely controlled.

[0010] The control means is operated from the outside and includes a changeover switch for switching the controlled range of the infrared remote control device to either a relatively wide first range or a relatively narrow second range; and means for driving the light emitting means so that the reachable range of the infrared rays emitted by the light emitting means is one of the first range and the second range in response to a switching input of the changeover switch. It may be configured as follows.

[0011] The control means is operated from the outside to control a controlled range of the infrared remote control device into a third range that includes a relatively far distance from the device and a fourth range that is relatively close to the device. a changeover switch for switching to either one, and in response to a changeover input of said changeover switch;
The light emitting device may be configured to include means for driving the light emitting device so that the range of infrared light emitted by the light emitting device reaches one of the third range and the fourth range.

0012

[Operation] The infrared remote control device according to the present invention is constructed as described above, and the control means variably controls the reach range of the emitted infrared rays by the light emitting means according to the controlled range of the controlled object to be remotely controlled. Therefore, the reach range can be variably controlled so that the infrared rays reach the target to be controlled.

[0013] The control means selectively switches the infrared reach range to either a relatively wide first range or a relatively narrow second range based on an externally operated changeover switch input. It acts to drive the light emitting means.

Further, the control means is configured to change the controlled range to a third range relatively far from the device and a fourth range relatively close to the device, based on an externally operated changeover switch input.
The light emitting means is actuated by selectively switching to either one of the ranges.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, five embodiments of the present invention will be described in detail with reference to the drawings.

[0016] In the infrared remote control devices according to the five embodiments described below, each of the infrared remote control devices can variably set the controlled range according to the user's wishes, thereby limiting the desired controlled devices. The control signal is configured to effectively reach the controlled device.

Among the five embodiments described below, the infrared remote control devices in the first to third embodiments can switch the controlled range to either a relatively wide range or a relatively narrow range. The infrared remote control devices in the fourth and fifth embodiments are configured such that the controlled range is a relatively far range including a distance from the device and a relatively short range including the vicinity of the device. It is configured so that it can be switched to either one.

First, a first embodiment will be explained. FIGS. 1(a) to 1(d) are diagrams for explaining the configuration of an infrared remote control device according to a first embodiment of the present invention and the switching state of a controlled range.

FIG. 1(a) is a schematic diagram showing the functional configuration of an infrared remote control device 1a according to a first embodiment of the present invention.

In the figure, an infrared remote control device (hereinafter referred to as
Reference numeral 1a (referred to as a remote control) includes a changeover switch unit 120 that outputs a changeover signal CHa in response to a changeover switch operated by a user, a control unit 110 to which the changeover signal CHa is applied, and a lens drive unit that is driven and controlled by the control unit 110. 111, a solenoid 112 that is driven by the lens driving section 111 to move the lens 101 installed in advance to the front of the light emitting section of the LED 11, which is an infrared light emitting section.

[0021] The lens 101 is connected to the solenoid.
It is fixedly attached to the movable piece 112. The solenoid 112 has a built-in coil (not shown), and when a current is applied in a predetermined direction from the lens driving section 111 in the previous stage, this coil operates as a kind of electromagnet and applies an attractive force to the movable piece. The movable piece is pulled or pushed out. As a result, the lens 101 fixedly attached to the movable piece is pushed out to the front of the light emitting part of the LED 11 or pulled back from the front of the light emitting part of the LED 11.

The changeover switch section 120 is operated from the outside to switch the range to be controlled by the remote controller 1a. The changeover switch section 120 is operated so that the controlled range is switched to either the wide range or the narrow range described above.

FIG. 1(b) shows an outline of the controlled range switching operation of the remote controller 1a shown in FIG. 1(a).

As shown in FIG. 1(b), the controlled range of the remote controller 1a is switched to either a wide controlled range 201 or a narrow controlled range 202. The changeover switch section 120 of the remote control 1a
When set to a position where the controlled range is wide,
The reach range of the control signal is the controlled range 201, and the controlled devices a2 and a installed within this range 201
3 can be controlled remotely.

Next, when the changeover switch section 120 is set to a position where the controlled range becomes narrow, the reachable range of the control signal becomes the controlled range 202. Therefore, since the control signal from the remote controller 1a reaches only the controlled device a3, it is possible to remotely control and operate only the controlled device a3.

A method of switching the above-mentioned controlled range to either the wide range 201 or the narrow range 202 will be explained.

FIGS. 1(c) and 1(d) show the switching states of the controlled range 201 and the controlled range 202.

As shown in FIG. 1(c), when the controlled range of the remote controller 1a is set to a wide range 201, the user switches the selector switch section 120 to the wide range position. In response to this, switching signal CH
a is given to the control unit 110, and in response, the control unit 110 applies a current to the coil of the solenoid 112 via the lens drive unit 111 in the direction of pulling the lens 101. As a result, the lens 101 is pulled back toward the solenoid 112 from the front surface of the light emitting section from the LED 11. Therefore, the infrared signal from the LED 11 reaches the controlled range 201 with a directivity angle θ as shown in FIG. 1(c).

On the other hand, when the controlled range of the remote control 1a is set to the narrow range 202 as shown in FIG. 1(d), the user switches the selector switch section 120 to the narrow range position. In response to this, switching signal CH
a is given to the control unit 110, and accordingly the control unit 110
A current is applied to the coil of the solenoid 112 via the lens drive unit 111 in a direction that pushes out the lens 101. As a result, the lens 101 is moved and fixed in front of the light emitting section of the LED 11. Therefore, the infrared signal transmitted from the LED 11 with the directivity angle θ is focused by the lens 101 and reaches the controlled range 202 .

As described above, according to the remote control 1a according to the first embodiment, the range to be controlled is changed over by the switch section 1.
Lens driven according to switching signal CHa from 20
101, wide range 201 and narrow range 202
Since it is switched to either one of the above, it is possible to select and limit the controlled equipment.

Although the remote control 1a uses the electromagnetic force of the solenoid 112 as the drive source for moving the lens 101, the drive source may also be a motor.

In the remote control 1a of the first embodiment, the range to be controlled is switched between a wide range and a narrow range depending on whether or not the lens 101 is inserted in front of the LED 11, which is an infrared light emitting part. It is also possible to perform this by providing several LEDs and switching the number of lighting of these plurality of LEDs. This will be explained in the following second example.

FIGS. 2(a) and 2(b) show the second embodiment of the present invention.
FIG. 2 is a diagram for explaining the configuration of an infrared remote control device according to the embodiment and the switching state of a controlled range.

FIG. 2(a) shows an infrared remote control device (hereinafter referred to as a remote control) 1b according to a second embodiment of the present invention.
FIG. 2 is a schematic diagram showing the functional configuration of.

In the figure, like the remote controller 1a described above, a remote controller 1b is externally operated to switch the control signal reach range of the remote controller 1b to either a wide range or a narrow range, and accordingly outputs a switching signal CHa. It includes a switch section 120 and a control section 110, and further includes:
LED driving section 119, a resistor 1 in the driving section 119
LEs connected via 31, 132 and 133
Contains D11, 12 and 13. The LEDs 11 and 12
and 13 are resistors 131, 13 connected to the preceding stage.
The emission intensity is defined by the respective resistance values of 2 and 133.

The control section 110 is a changeover switch section 120
In response to application of switching signal CHa from L.
A lighting control signal for the LEDs 11, 12, and 13 is output to the ED drive section 119. The control unit 110 controls the signal C
When it is detected that a wide range of control is specified based on Ha, the drive section 119 controls the lighting of all of the LEDs 11 to 13 to transmit an infrared signal. Conversely, when it is detected that the controlled range is specified as a narrow range based on the signal CHa,
Via the drive unit 119, it operates to, for example, turn on only the LED 11 and send out an infrared signal.

FIG. 2(b) shows an outline of the controlled range switching operation of the remote controller 1b shown in FIG. 2(a).

When the changeover switch section 120 of the remote control 1b is set to a position where the controlled range is wide, each of the LEDs 11 to 13 transmits an infrared signal with a directivity angle θ, as described above. The signal reach range is a wide range including all of the controlled ranges 21, 22, and 23. On the other hand, the changeover switch section 12 of the remote control 1b
When 0 is set to a narrow range position, only the LED 11 transmits an infrared signal as described above.
The signal reach range is limited to the controlled range 21 only.

The remote control 1b described above is equipped with a plurality of LEDs as infrared light emitting sections in advance, and the number of lighting of the LED group is switched and controlled in response to the switch operation of the changeover switch section 120. The control range is switched between a wide range and a narrow range. This can also be done by moving the light emitting direction of the infrared light emitting section. This will be explained in the following third example.

FIGS. 3(a) to 3(c) are diagrams for explaining the configuration of an infrared remote control device according to a third embodiment of the present invention and the switching state of the controlled range.

FIG. 3(a) shows an infrared remote control device (hereinafter referred to as a remote control) 1c according to a third embodiment of the present invention.
FIG. 2 is a schematic diagram showing the functional configuration of.

In the figure, the remote controller 1c is externally operated in the same way as the remote controllers 1a and 1b described above to switch the control signal reach range of the remote controller 1c to either a wide range or a narrow range, and accordingly a switching signal CHa is output. a changeover switch unit 120 that outputs the output, and a control unit 110
including. The remote control 1c further includes an LED driving section 113 and a motor 114 rotationally driven by the driving section 113.
and 115, said motor 114 and 115
LED11 whose movement is controlled in conjunction with each rotation of
and 12.

[0043] The control section 110 is the changeover switch section.
In response to being given the switching signal CHa from 120, a movable signal for the LEDs 11 and 12 is given to the LED driving section 113. The LED driver 113 provides a rotational drive signal to the motors 114 and 115 in response to the movable signal. When the motors 114 and 115 are supplied with the drive signal, they rotate by a predetermined angle in a predetermined direction based on the drive signal. In conjunction with this, the LED
11 and 12 are rotated by a predetermined angle in a predetermined direction, and their infrared emission range is variably adjusted.

FIGS. 3(b) and 3(c) show the above-mentioned No. 3
An overview of the controlled range switching operation of the remote controller 1c shown in FIG. 1(a) is shown.

When the changeover switch section 120 of the remote control 1c is set to a position where the controlled range is wide, the LEDs 11 and 12, which are infrared light emitting sections, are arranged at an angle α as shown in FIG. 3(b). each transmits an infrared signal. At this time, L.E.
Since each of D11 and D12 transmits an infrared signal at a directivity angle θ, its reach is a wide range including controlled ranges 21 and 22. Note that when the controlled range is set to a wide range, the maximum angle formed by the controlled range is (θ +
α).

On the other hand, the changeover switch section 1 of the remote control 1c
When LED 20 is set to a position where the controlled range is narrow, the LEDs 11 and 12 are moved and arranged so as to maintain a parallel positional relationship. That is, the control section 110 controls the switching signal CHa of the changeover switch section 120.
Motor 1 via LED driver 113 in response to
14 and 115 are rotated by a predetermined angle in a predetermined direction so that the LEDs 11 and 12 have a parallel positional relationship. Therefore, as shown in FIG. 3(c), L
Although the EDs 11 and 12 have a wider arrangement width L between them, their respective directivity angles θ are maintained, so the reach range of the infrared signals is narrow enough that the controlled ranges 21 and 22 overlap. range.

As in the above-mentioned remote controller 1c, by variably adjusting the light emitting direction of the LEDs 11 and 12, which are infrared light emitting parts, in response to the switching signal CHa of the changeover switch part 120, the controlled range can be adjusted to a narrow range or a wide range. It is possible to switch to either one.

Note that the remote control 1c has LEDs 11 and 1.
Although motors 114 and 115 are used as drive sources for moving the light emitting direction in order to variably set the light emitting direction of the light emitting device 2, the present invention is not limited to motors.

The remote controllers 1a, 1b, and 1c described above can variably set the controlled range by switching the controlled range to either a wide range or a narrow range, and send control signals limited to the desired controlled equipment. transmission is possible. Similarly, by switching the controlled range to either far from the device or close to the device, the controlled range can be variably set, and the control signal can be transmitted only to the desired controlled device. The infrared remote control device will be described in the following fourth and fifth embodiments.

FIGS. 4(a) and 4(b) are diagrams for explaining the configuration of an infrared remote control device and the switching state of the controlled range according to a fourth embodiment of the present invention.

FIG. 4(a) shows an infrared remote control device (hereinafter referred to as a remote control) 1d according to a fourth embodiment of the present invention.
FIG. 2 is a schematic diagram showing the functional configuration of.

In the figure, the remote controller 1d includes a changeover switch section 121 that outputs a changeover signal CHb in response to a switch operation by a user, and is supplied with the changeover signal CHb, and its signal input side is connected to a high power supply section VH and a low power supply section. A voltage changeover switch 51 that is switched to either one of VL and derives the supplied voltage from the switched power supply section to the output side, the output voltage of the switch 51 is applied via a resistor 110, and accordingly emits infrared rays. Includes LED11.

The changeover switch section 121 changes the infrared light emitting range of the LED 11 from the remote control 1d to a far distance in response to the user's external switch operation.
A switching signal CHb is applied to the voltage changeover switch 51 so as to switch to one of the voltages close to d. The switching signal CHb acts to switch the signal input side of the switch 51. In other words, if the user
), if you wish to remotely control the controlled device a2 located far away from the remote controller 1d, and set the switch of the changeover switch section 121 to the far side,
Accordingly, a switching signal CHb is output, and the signal CHb is
It acts to switch the input side of the voltage changeover switch 51 to the high power supply section VH side. Conversely, as shown in FIG. 4(b), the user desires to remotely control the controlled device a4 located near the remote controller 1d, and sets the switch of the changeover switch section 121 to the near side. Then, the switching signal CHb is output accordingly, and the signal C
Hb acts to switch the input side of the voltage changeover switch 51 to the low power supply section VL side.

As described above, the voltage changeover switch 51
The supply voltage from either the high power supply section VH or the low power supply section VL outputted through the resistor 110 controls the forward current of the LED 11 . At this time, the LED
The forward current (referred to as IF) of 11 is proportional to the supply voltage (referred to as V) from the voltage selector switch 51, and
Since it is inversely proportional to the resistance value (referred to as R) of 110, IF=
Defined as V/R. Therefore, the voltage changeover switch 5
By switching 1, the voltage supply source of LED11 is switched to the high power supply section VH.
The magnitude of the forward current IF can be variably set by switching to either one of the power source VL and the low power source VL.

FIG. 5 is a graph showing the relationship between the forward current and the infrared radiation intensity of the LED, which is the infrared light emitting unit installed in the infrared remote control device of the present invention.

In FIG. 5, the horizontal axis shows the forward current IF (unit: mA) of the LED 11, and the vertical axis shows the forward current IF of the LED 11.
The infrared radiation intensity φ (unit: mW) of 1 is taken. As shown in FIG. 5, the infrared radiation intensity φ increases in proportion to the magnitude of the forward current IF of the LED 11, which is the infrared light emitting section. Therefore, in order to change the reach distance of the infrared rays emitted from the LED 11, in response to switching the voltage changeover switch 51, the forward current IF
It can be seen that the infrared radiation intensity φ can be variably set by variably setting the magnitude of .

In the remote controller 1d, when the control signal reaches a long distance by switching the changeover switch section 121 (corresponding to the controlled range 2 in FIG. 4(b)),
The switching signal CHb switches the input side of the voltage changeover switch 51 to the power supply section VH side, thereby increasing the infrared radiation intensity φ of the LED 11. Conversely, when the control signal only needs to reach a relatively close location of the remote controller 1d (corresponding to the controlled range 4 in FIG. 4(b)), the switching signal CHb is determined by the switching operation of the changeover switch section 121. switches the input side of the voltage changeover switch 51 to the power supply unit VL side to suppress the infrared radiation intensity φ of the LED 11. In this way, the infrared radiation intensity φ of the LED 11 is variably adjusted, and the range to be controlled by the remote controller 1d is switched from near to far.

The above-mentioned remote controller 1d realizes switching of the controlled range from near to far by switching the supply voltage level to the LED 11, which is an infrared light emitting section, in response to the switching of the switch 121. As shown in the embodiment, it is possible to switch the controlled range from near to far while keeping the supply voltage constant.

FIG. 6 is a schematic diagram showing the functional configuration of an infrared remote control device according to a fifth embodiment of the present invention.

In the figure, an infrared remote control device (hereinafter referred to as
(referred to as a remote control) 1e is a power supply section VC which is a constant voltage source;
Resistors 111 and 112, a changeover switch unit 121 which outputs a changeover signal CHb which is operated by the user and accordingly switches the range to be controlled by the remote controller 1e, and which is supplied with the changeover signal CHb; It includes a resistor changeover switch 52 that switches the resistors 111 and 112 to either side, and an LED 11 that is given an output signal from the switch 52 and emits infrared light accordingly. Note that the resistance 1
11 and 112 are their resistance values (resistance 111
＞Resistance 112).

The above-mentioned remote control 1e, like the above-mentioned remote control 1d, changes the forward current level of the LED 11, which is a light emitting section, in order to switch the distance of the controlled range. In other words, since the power supply section VC is a constant voltage source (resistance 111>resistance 112), in order to extend the controlled range to a far distance, the infrared radiation intensity φ of the LED 11 must be increased, that is, the forward current IF level Since it is necessary to make the resistance high, the input side of the resistance selector switch 52 has a resistance.
It may be possible to switch to the 112 side. Conversely, in order to set the controlled range close to each other, the infrared radiation intensity φ of the LED 11 may be low, that is, the forward current IF level may be low, so the input side of the resistance selector switch 52 is set to the resistance 111 side. It would be better if it could be switched. Therefore, depending on the user's wishes, the changeover switch section 121
is set to a position that extends the controlled range far away, the switching signal CHb acts to connect the signal input side of the resistance changeover switch 52 to the resistance 112 side, and conversely, the changeover switch section 121 When set to a position that brings the controlled range close to each other, the switching signal CHb connects the signal input side of the resistance selector switch 52 to the resistor.
It acts to switch the connection to the 111 side.

As described above, the resistance changeover switch 52 is changed in response to the changeover signal CHb outputted from the changeover switch section 121 which is operated according to the user's desire, so that the forward current level of the LED 11 is changed. be able to. Therefore, the infrared radiation intensity φ of the remote control 1e is switched in accordance with the switching of the changeover switch section 121, and the range of infrared radiation can be switched between near and far.

The above-mentioned remote control 1e is equipped with a plurality of resistors in advance to switch the forward current level of the LED 11.
This is done by switching the connection between ED11 and the resistor, but LE
A variable resistor is provided in advance at the front stage of D11 to control the switching signal C.
The resistance value of the variable resistor may be changed depending on Hb.

Furthermore, in both the remote controllers 1d and 1e described above, switching between far and near controlled ranges is achieved by switching the magnitude of the forward current of the LED 11, which is an infrared light emitting section. The LED 11 is always stably supplied with a forward current that can reach infrared rays up to
A filter having a characteristic of attenuating the light emission intensity may be inserted in front of the light emitting part.

As mentioned above, by switching the remote control switch to the narrow range side and transmitting the infrared signal,
It becomes possible to remotely control and operate only the target controlled device. Also, if the controlled devices are installed almost overlapping in direction, but there is a distance between them,
By switching the switch on the remote control to the short distance side, it becomes possible to remotely control and operate only the controlled devices installed near the remote control.

[0066]

Effects of the Invention The control means of the infrared remote control device according to the present invention can variably set the reachable range of the infrared rays by the light emitting means that emits infrared rays according to the range to be controlled. Even if the device is installed in a state where the control device is installed in a state where the device is installed in a state where the control signal is transmitted to only a specific device to be controlled, it is possible to remotely control the device.

[0067] Furthermore, the control means responds to an externally operated changeover switch and a changeover input to the switch, and controls the reachable range of the infrared rays to be either a relatively wide first range or a relatively narrow second range. Since the light emitting means can be driven so as to switch to one of the two, when it is desired to operate only one of the laterally adjacent controlled devices, the light emitting means can be driven to switch to one of the two.
By switching the range and transmitting, there is an effect that only the target controlled device can be remotely controlled.

Further, the control means includes an externally operated changeover switch, and responds to a changeover input of the switch to change the reach range of the infrared rays to a third range, which is relatively far away, and a fourth range, which is relatively close to each other. Since the light emitting means can be driven to switch to either one of the ranges, if the controlled devices almost overlap directionally but there is a distance between the front and back, the switch can be driven to switch to the fourth range. By switching to the infrared rays and transmitting the infrared rays, it is possible to remotely control only the controlled devices installed in a desired nearby location.

[Brief explanation of the drawing]

FIGS. 1A to 1D are diagrams for explaining the configuration of an infrared remote control device according to a first embodiment of the present invention and switching states of a controlled range.

FIGS. 2(a) and 2(b) are diagrams for explaining the configuration of an infrared remote control device according to a second embodiment of the present invention and a switching state of a controlled range.

FIGS. 3A to 3C are diagrams for explaining the configuration of an infrared remote control device according to a third embodiment of the present invention and switching states of controlled ranges.

FIGS. 4(a) and 4(b) are diagrams for explaining the configuration of an infrared remote control device according to a fourth embodiment of the present invention and a switching state of a controlled range.

FIG. 5 is a graph showing the relationship between forward current and infrared radiation intensity of an LED, which is an infrared light emitting unit, installed in an infrared remote control device according to an embodiment of the present invention.

FIG. 6 is a schematic diagram showing the functional configuration of an infrared remote control device according to a fifth embodiment of the present invention.

FIG. 7 is a diagram schematically showing a control signal reach range of a conventional infrared remote control device.

[Explanation of symbols]

1a to 1e Infrared remote control device (remote control) 1
1, 12 and 13 LED 51 Voltage changeover switch 52 Resistance changeover switch 101 Lens 110 Control section 111 Lens drive section 119 LED drive sections 120 and 121 Changeover switch sections CHa and C
Hb Switching signal IF Forward current φ Infrared radiation intensity In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] 1. An infrared remote control device that remotely controls a controlled object by modulating and transmitting infrared rays, the device comprising: a light-emitting means for emitting the infrared rays; An infrared remote control device, comprising: a control means for variably controlling the reach range of infrared light emitted by the light emitting means according to a controlled range. 2. The control means is operated from the outside,
The control range of the infrared remote control device is relatively wide.
and a relatively narrow second range, and in response to a switching input of the changeover switch, the range of infrared light emitted by the light emitting means is set to the first range. The infrared remote control device according to claim 1, further comprising means for driving said light emitting means so as to be in one of the second ranges. 3. The control means is operated from the outside,
a changeover switch for switching the controlled range of the infrared remote control device to either a third range including a relatively far distance from the device or a fourth range relatively close to the device; In response to the switching input,
The reach range of infrared rays emitted by the light emitting means,
The infrared remote control device according to claim 1, further comprising means for driving said light emitting means so as to be in one of said third range and said fourth range.